Had it under the title "Younger Boyfriend", couldn't find it (or even what it was) anywhere... This one's amazing.

SPECTACULARLY drawn, too. Stunning attention to detail. Characters can change clothing several times per chapter, and not for sexual reasons either, but just cause it's situation appropriate... or just to indicate the passage of time or a scene change. People twirl ice cubes in their drinks while waiting or wear one earphone, hairstyles get wet or mussed and change dynamically, and the laws of physics actually seem to apply to cleavage... That sort of thing.

PS someone grow up and/or take a break from all them lolis and tentacles and whatnot and actually finish translating this AMAZING H-MANGA... though, by 2013 standards, it's probably more like Borderline H plotporn already.